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Supplier details checked 2026-09-23 · Test catalog
1999-2004 Ford Lightning with 5.4L Supercharged engine. Fits 2/4 wheel drive. - Aggressive to moderate sound
Flowmaster American Thunder Cat-back Exhaust System
Includes Hangers and Hardware for an Easy Installation
Mandrel-bent 16-gauge Aluminized Steel Tubing
Moderately Aggressive Exterior Exhaust Tone
Super 50 Series Performance Muffler
Dyno Tuned for Maximum Performance
Uses the Factory Hanger Locations
3-year Limited Warranty
Easy Installation
Fits 1999-2004 Ford Lightning with 5.4L supercharged engine, fits 2/4 wheel drive.
Flowmaster 99-04 Ford F-150 Lightning American Thunder Cat-Back Exhaust System
9904 FORD F150 LIGHTNING AMT
SYS 99-04 FORD F150
For the person who wants the aggressive look of a NASCAR race truck along with all the benefits that a Flowmaster Cat-back exhaust system provides. D.O.S.S. (Dual out same side) systems are the perfect choice. This American Thunder system features a Super 50 Series performance muffler that delivers a moderately aggressive exterior sound with a moderate interior tone, which is suited to the enthusiast who wants their performance to be heard. The dual 2.50-inch mandrel-bent tailpipes exit in front of the right side rear tire and are finished off with dual 3.00-inch polished stainless steel tips. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, the system includes all necessary parts and hardware for easy installation and is covered by our 3-year Limited Warranty.
SYS 99-04 FO
